# uncompyle6 version 3.2.3
# Python bytecode 3.6 (3379)
# Decompiled from: Python 3.6.8 |Anaconda custom (64-bit)| (default, Feb 21 2019, 18:30:04) [MSC v.1916 64 bit (AMD64)]
# Embedded file name: site-packages\sqlalchemy\dialects\mysql\json.py
from __future__ import absolute_import
import json
from ...sql import elements
from ... import types as sqltypes
from ... import util


class JSON(sqltypes.JSON):
    """MySQL JSON type.
    
    MySQL supports JSON as of version 5.7.  Note that MariaDB does **not**
    support JSON at the time of this writing.
    
    The :class:`.mysql.JSON` type supports persistence of JSON values
    as well as the core index operations provided by :class:`.types.JSON`
    datatype, by adapting the operations to render the ``JSON_EXTRACT``
    function at the database level.
    
    .. versionadded:: 1.1
    
    """

    pass


class _FormatTypeMixin(object):
    def _format_value(self, value):
        raise NotImplementedError()

    def bind_processor(self, dialect):
        super_proc = self.string_bind_processor(dialect)

        def process(value):
            value = self._format_value(value)
            if super_proc:
                value = super_proc(value)
            return value

        return process

    def literal_processor(self, dialect):
        super_proc = self.string_literal_processor(dialect)

        def process(value):
            value = self._format_value(value)
            if super_proc:
                value = super_proc(value)
            return value

        return process


class JSONIndexType(_FormatTypeMixin, sqltypes.JSON.JSONIndexType):
    def _format_value(self, value):
        if isinstance(value, int):
            value = "$[%s]" % value
        else:
            value = '$."%s"' % value
        return value


class JSONPathType(_FormatTypeMixin, sqltypes.JSON.JSONPathType):
    def _format_value(self, value):
        return "$%s" % ("").join(
            [
                "[%s]" % elem if isinstance(elem, int) else '."%s"' % elem
                for elem in value
            ]
        )
